Circuit-breaker for magnetos.



J. H. RICHARDS. CIRCUIT BREAKER FOR MAGNETOS. APPLICATION FILED AUG. 26, 1914.

WITNESSES: I h as 15' 51 223 1??? ozw. .m. Wm?

ATTORNEY:

Patented J an. 19, 1915.

UNITED STATES PATENT OFFICE.

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GIMHITv-BBEAKER FOR MAGNETOS.

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mt ll Jan. 19, 1915.

Application filed au st 26, 1014. s rial no. spam.

To all whom it may concern Be it known that I, JULIUs H, Rrcmans, a citizen of the United States, resident of Ne 'ark, county of Essex, State of New Jersey, have invented a certain new and useful Improvement in Circuit-Breakers for Magnetos, of which the following is a specification, giving a full and clear description, such as will enable'those skilled in the art to which it pertains to make and use the same.

This invention relates particularly to the control device used on magnetos of the type adapted for use in connection wit inteqnal combustion engines; and has for ts ob] ect the provision of a novel circuit breaker mechanism which is adapted to make and break the circuit through the primary of the magneto at proper and regular intervals.

One of the features of my invention is the method of supporting and lubricating the breaker arm.

Another feature of my invention is the method of constructing the cam engaging element and means for attaching this to the breaker arm so that it may be readily changed in position to present a new wearing surface to the cam in the breaker box and also to act as a stopping means to the movement of the breaker arm at the time when the contacts are opened.

In the drawings which form a part hereof and in which like reference characters designate like parts for the several views: Figure l is a top view of a preferred form of my invention. Fig. 2 is a front View of Fig. 1. Fig. 3 is a front view of the breaker face plate with the breaker arm removed. Fig.

' 40 4 is a front view of a wearing piece which is adapted to engage the cam or cams in the breaker box. Fig. 5 shows the breaker arm with the breaker element of Fig. 4 mounted thereon. Fig. 6 is a view onthe line of AB on Fig. 5 looking in the direction of the arrow.

T have not shown in the drawing any breaker box but my circuit breaker can be adapted to work with most any number of designs. one of which, is shown in patent to H. Cunningham "No. 1021506, in which the breaker box carries the cams, which are therein to meet the required'conditions. vRe erring ne r u ar? o th 5 185i i th 14 1. t h h rig dly attached .or which is made integral therewith the studs ,5 and 7. The stud 5 is counterbored on the front side. Said counterbore will be referred to later, Stud 7 is counterbored at 8, on the rear of the breaker 80 face plate, The hole 8 s to receive a ground brush. Mounted on plate 1 is a terminal block 2, being insulated therefrom by the insulators 24 and 25, a screw 26 being used to help hold theterminal block there- 6 to. A terminal connecting 'bolt. (not shown.) is ad pted to fit in, the hole 29 and serves to hol the breaker face plate on to the magneto. Mounted on the terminal block is the usual contact screw 3, which carries contact 4, said contact being adapt- .ed to engage contact 18 which is carried on the breaker arm 1-2. The breaker arm 12 has a. pivotal post 16 riveted thereto by means of rivet 27. The post 16 has holes 28, which connect the outer surface of the same with the opening 17 on the inside. In mounting the breaker 12 on the face plate 1, the post 16 fits within hole 6 of stud 5 and it is thus seen that the breaker arm 12 is rotatable on stud 5. The spring 15, one end of which is attached to stud 19. fastened to the breaker arm 12. and the other end engaging post 7. is used to return the breaker arm 12 to its normal position 35 and close the contacts 4 and 18, when the member 1,3 is not in engagement with the cams in the breaker box. The breaker arm 12 is retained in its position on stud 5 bv means of member 11, which is carried by stud 7. the member '11 being fastened to stud 7 by rivet 10 or other suitable means. said rivet passing through the hole 9 of the stud 7. i

It has been found diflicult to "keep the pivot bearing of the breaker arm of a high speed circuit breaker of this nature well lubricated and in using my invention, I fill the hole 17 in the post 16 with a nonfluid oil and as the bearing warms up in proportion to the speed, the non-fluid oil will begin ,to melt very slowiv and pass through the small holes 28 and will lubricate the inner walls of the hole 6 in the bearing stud 5. Consequently, it is seen that this construction will provide a self lubricating pivot, which will operate for a long time without the necessity of refilling "the hole or chamber 17. Since the bottom o is was to, a Ma of the hole 6 and is held in this position'by the member 11, practically all! of the oil which oozes out of the hole 17, comes out at the center of the bearing through the holes 28 as described.

To the breaker arm 12 is attached a wear ing piece or cam engaging element 13 by means of screw 21. lock washer 22 and nut 23., F astened to the breaker arm 12 is a pin 20, which is adapted to engage one of the holes 14 of the .member 13. The member 13 is usually constructed of fiber or is t e' new surface is presented to the cams. 1n

the past, it has been the usual practice to put a series of slots in the edge of the fiber roller or cam engaging element and use a spring to keep the said roller from turning. Difliculty has been experienced by this method on account of the breaking of the springs and consequent turning of the roller out of adjustment and my method of forming and mounting the roller or wearing piece on the breaker arm, as described, overcomes this difiiculty.

The element 13v is also constructed and;

mounted so that in the operation of the breaker arm by the roller or wearing piece hitting the cams as the breaker is turned by the magneto armature, member 13 strikes against the contact block 2, thereby preventing the tapered end of the arm 12, from striking against stud 7 thereby causing the end of the breaker arm carrying the contact pointto become displaced and at the same time limits the distance between, the contacts 1 and 18 when they are separated.

To any one skilled in the art, it will be apparent that numerous changes in details can -'be made without departing from the spirit of the invention or the scope of the appended claims.

Having now described my invention what I claim is:

1. In a device of'the class described, the combination of a mounting plate, a stud thereon, a breaker arm having a pivot attached thereto, said pivot having means for carrying lubricant, and means for allowing said lubricant to pass to the wearing surface of said stud, substantially as described.

2. In a device of the class described, the combination of a mounting plate, a breaker arm, means for pivotally mounting said arm onsaid plate, said means serving to carry a reserve supply of lubricant for said .pivotal means, as described.

3. In a device of the class described, the combination of a mounting plate, a breaker arm and a hollow pivot stud attached thereto, a hollow stud attached to said mounting plate, said hollow pivot stud on said arm adapted to be filled with lubricant and to fit within said hollow stud on the mounting plate and means to allow said lubricant to escape, whereby the pivot joint thus formed is kept lubricated, substantially as de-' scribed.

4. In a device of the class described, the

combination of a mounting plate, a hollow .stud thereon, a breaker arm having a hollow p1vot attached thereto and adapted to fit said hollow stud on the mounting plate, said.

pivot on the breaker arm having one or more holes therein, said hole or holes serving to feed stored lubricant to the pivotal joint formed by the union of the two studs, substantially as described.

5. 1n a device of the class described, the combination of a mounting plate, a stud thereon having a counterbored hole, a-

.breaker arm and a stud thereon having a counterbored hole for carrying a supply of lubricant, the last mentioned stud being adapted to fit within the counterbored hole of the other, and means to hold said studs in working relation to each other, as described.

6. In a device of the class described, the combination of a mounting plate, a breaker arm and means for pivotally mounting said arm on said plate, and means for retaining said arm in working position on its pivot,

" an adjustable wearing piece carrying by said arm, said wearing piece provided with one or more holes one of which engages a pin on said arm whereby said wearing piece is held in position, as described.

h 7 In a device of the class described, the combination of a mounting plate, a breaker arm, means for pivotally mounting said arm on said plate, means for holding said arm in operative position on said pivot, an adjustable wearing piece carried by said arm.

said wearing piece having a pluralitv of wearing surfaces and a plurality of holes therein, a pin on said arm adapted to engage one of said holes, whereby said wearing piece is held in adjusted position.

8. In a device of the class described, the combination of a mounting plate, and a -movable member, mounted thereon, an adjustabl'e wearing piece carried on said movable member, plurality of wearing surfaces and provided with holes wholly within the material thereof and intermediate said wearing surfaces, and means on said arm co-acting with said holes for holding said wearing means in position of adjustment.

9. In a device of the class described, the

said wearing piece having a combination of a mounting plate, a movable member mounted thereon, said movable member carrying a rotatively adjustable wearing piece, holes in said wearing piece and means co-a-cting with one of sad holes for holding said wearing means in operative position.

10. In a device of the class described, the combination of a mounting plate, a breaker arm pivoted thereon, said breaker arm carrying an adjustable wearing piece having holes therein, means on said arm co-acting with said holes to hold said Wearing piece in position, means carried by said breaker arm for retaining a supply of lubricant for its pivot, and means for limiting the movement of the breaker arm in one direction as described.

11. In a device of the class described, the combination of a mounting plate, a breaker arm pivotally mounted thereon, an adjustable wearing piece carried by said arm, an insulated contact block fastened to said plate, said block serving as a stop for said wearing piece and said arm when they are moved in one direction, substantially as described.

12. In a device of the class described, the combination of a mounting plate, a breaker arm pivoted thereon, said pivot having self contained means for carrying a supply of lubricant, said arm having attached thereto JULIUS H. RICHARDS.

Witnesses:

A. D. T. LIBBY, M. W. BARTLETT. 

